Locomotive-boiler furnace.



CHARLES B. MOORE, 0F ,F.VANSTON. ni-MOIS, ASE-IGNQR, BY 'ME-SNEASSIGNMENTS,

T0 AMERICAN ARCH CQMPANY, OF NEW YDBK, N. Y., A CORPCRAT'ION 0F DELA-WARE.

iocouorrvn-Boirnn renuncia.

Specification of Letters Patent.

Patented May 4, 1915.

To allw'hom it may concern 'Be it known that I, CHARLES B. MOORE, acitizen of the United States, and resident ot the cityA of Evanston7county of Cook, and State of Illinois, have invented certain new unduseful Improvements in Locomotiveioiler Furnaces, of which the followingis :i specification.

Mv invention relates to improvements in locomotive furnaces and hasarticular reference to improvements in refractory deilecting. walls orbattles otherwise known as arches for the fireboxes of locomotives.

The general objects of my invention are to provide a. refractory archwhich canbe easily and quickly installed yin a locomotive iireboxwithout the necessity'of any preparatory work being done on the box; topio vide an arch which shall be of Alight weight and low cost; toprovide an arch which shall be easy `to repair and parts of which can bereadily removed to afford easy access to ire box sides and to the fluesheet for necessary repairs thereto; and to provide an arch of a formthat shall materially assist in the admixing of the rebox gases. h

A special object of my invention is to provide an arch of the characterhere outlined which shall be particularly adapted for in` stallation inlocomotive boilers which are equipped with one or more inclinedcirculating tubes.

My invention consists in various novel constructions and arrangementsand combinations of parts by which the above objects are attained,together with others hereinafter appearing, and all as fully described`with reference to the accompanying drawings and as particularly pointedout in the appended claims.

In said drawings, which forni a part of this specification, I haveillustrated a prefoi-red form of my invention and have illustrated itsapplication to locomotive fireboxes having various arrangements ofcirculating tubes.

Figure l of said drawings is a central longitudinal sectional view of a.locomotive fireboX equipped with a refractory arch the whole embodyingmy invention; Fig. 2 isa horizontal sectional view of the irebox showinga top plan view of the arch and taken on line.2-'2 of Fig. 1; Fig. 3 isa transverse sectional View of the ireboX on the line 3 3 of Fig. land'showing a rear. handled and placed in position with ease 110circulatin end elevation of the arch; Fig. 4 is a transn verse sectionalview of the arch on the line 4 4 of Fig. l; Figs. 5, 6 and 7 are viewssimilar to Fig. 4 but showing the inven-A tion as applied' to fireboxeshaving diiferent arrangements of circulating tubes; Fig. 8 is anenlarged fragmentary end elevation of the arch more clearly illustratingthe interlocking joint between the panel bricks and the supportingbricks; and Fig. 9 is a view in perspective of one of the interlockingpanel bricks. i

My invention is capable of embodiment in arches occupying variouspositions in the iirebox and having different specific functions and,although have conlined the illu'stration of the invention'to iso-calledfront arches, it should at once bel understood that my inventionis notthus. limited. A socalled front arch usually occupies an iiiclinedposition in the Firebox extending from side to side ther n z' .d havingits forward end in abutment with or arranged close to the iue sheet. TheV rincipal function'of 'these arches is to de ect the tirebox gases outof their.direct line of flow from the grate to the flues and not onlycause them' to travel back and forth in the irebox and therebydistribute their heat to the whole 'interior surface of the firebox butalso to retain them in the firebox a suiicicnt time 'to permit completecombustion to take place before the gases escape ythrough the fines.

A locomotive boiler irebox, as illustrated in the drawings, is made upof a flue sheet 2, side sheets 3, 3, a. crown sheet 4 and a rear sheet5. The tlrebox has af grate 6 and therear sheet is provided with a fueldoor or opening 7. Flues 8 lead forward lfrom the flue sheet. Theiirebox illustrated in Figs. 1 to 4 is provided `Jvjitli two inclinedwater tubes extending from the lower portion o the flue sheet to theupper portion of the rear sheet and serving Yto increase the circulationof water betwe` tl? Jiront and rear water legs of the boiler Aparticular featureof iL invent-ion resides in an arch which is mace upof a nuinber of individual bricks of several diiierent shapes and formedto be supported upon and by the circulating tubes and the side sheets ofthe irebOX. These individual briclrsare limited in size by the features.that they shall not be too heavy .to lb@- and that they should be smallenough to be readily passed through the fire door.

The arches which I have illustrated in the drawings are built of twoforms ofbricks, t'. e., supporting bricks which rest upon and span thetubes, and cover or panel bricks which space the supporting vbricksipartand substantially close the openings; between them. arrange thesupporting bi'icks A in transverse rows or lines across the fireboxsuitably' spaced apart to receive and support the panel bricks rl`hedimensions of the supporting bricks are determined by the spacing of thetubes in the tirebox. lVhere the spaces to be spanned are comparativelywide, I use two of the bricks placing them together in the form of aninverted V and thus forming a seltsupporting span or arch. The length ofthese bricks being determined bythe spacing of the tubes, theircross-sectional area or their weight is determined by the features abovementioned, that is, that they shall be light enough to be readilyhandled and small` enough to be passed into the lireboX through the fueldoor. l preferably forni the supporting 'bricks substantially square incross section, that is, making them as deep as they are wide and theyare thereby given a sullicient bearing'upon the tubes so that when onceplaced in position they rest securely without rocking on the tubes. Iprovidethe lower ends oi' these bricks with sockets or grooves A',substantially fitting the curvature of the tubes and adding to thestability ol the l 'icks ,when once in position.

In the preferred form of my invention I use four of 'the vsupportingbricks in each row or line, each of the outer bricks resti-ng at itsinner end upon atube and inclining upwardly and outwardly -against oneof the side sheets of the firebox and the middle two bricks of tlferowresting upon the tubes and virtually abutting each other substantiallymidway between the tubes. ,I interlock the adjacent bricks together ineach row of the supporting bricks to prevent any possibility of theirbeing separated through the jarriny ell'oct of the locomotive whenrunning. While l might make use of separate or additional bricks for thepurpose of locking the supporting bricks together, I prefer to form thepanel bricks Bin such a manner that they will perform the functions notonly of holding the supporting bricks in their proper spaced relationand closing the openings between them, but will also perform thefunction of interlocking 'the supporting bricks in such a manner thatthe supporting bricks are held against relative movement and the arch,as. a whole, is securely retained in its proper .working condition.

The ends of the supporting bricks A are provided with ribs or hooks A2which project upwardly and extend from side to side thereof and thepanel or cover bricks l are provided with downwardly projecting lioolcsor ribs B1 on their ends spaced apart a sailicient distance to span thehooks fil en the abutting ends of adjacent supporting bricks. As shownin the drawings, l place one olf the panel bricks l spanning each pairof the abutting ends ot' the supporting bricks and l proportion thewidth ot' the bricks l), so that a single brick substantially sills thespace between the locking 'panel bricks and thereby the arch iscompleted. l preferably form the. bricks l with projecting end portions132 adapted to rest upon the upper surv face of the supporting bricksand thereby hold the panel bricks in position. It will non' be notedthat regardless of the `shape of the individual bricks, thearch as a'wholev presents many angularly disposed surfaces and gasmixingpocsketfs or cavities whereby the ellect of the arch in av'lmixing .theis greatly enhanced. l add to this function of the arch by providing theundersides of the supporting bricks n ith gas-1nif;ingpock ets A whichextend substantially the length and width of the brick and thereby notonly lighten the individual bricks but also provide them withcomparatively thin (lopendingr flanges A4. These langes, beingcomparatively thin, quickly attain to the'xnaxi nunn temperature ol' thetirebox and therebyr assist in the ignition ot' the fuel particles andgases. l provide eachof the panel bricks l with a depending portion Bf:which projects below the upper surfaces of the 4supporting bricks andprovides the brick with end walls or surfaces l5* adapted to contact'with the sides ot',tl1e supporting bricks and thereby hold 'thesupporting bricks properly spaced. rl`hese depending portionsareprovided with gas-mixing pockets 15" which not only' lighten, the brick,but

provide the' arch with additional sul'isit'liary gas-mixing orconnningling pockets or cavities B.

In building my arches I pla a row or line of the supporting bricks inposition resting them 11pm-`tlie tube.L ud against the flue sheet, theend bricks of the rovv being piaf-el upon tbe tubes and leaning againstthe. side sheets. l then place a second line or ron' of the supportingbricks above and parallel with the first row and hold this second row inposition by placing one of the cover or panel bricks upon and betweeneach of the corresponding joints .in the tvvo rows of supporting bricks.',l`hese panel bricks thus plat-ed retain the two rows of supportingbricks securely in their positions as the panel lu'icks interlock theadjacent bricks oli each row together and the arch being arranged in aninclined position, the weight ol' the bricks holds the arch donn againstthe flue sheet. I complete this part of the arch by placing additionalpanel bricks between those already placed and thus completely close theopenin s between the spans of sup orting bricks. n some-instances amarch mined of two` rows of supporting bricks and one of panel brickswould be Vsufficiently high, but usually it is desired which certainportions may be readily removed without disturbing the arch as a wholewhen it is necessary to repair the side sheets or liuesheet of thefirebox. My arch being composed of individual bricks of a size which areeasy to handleis one which can be placed in position with a minimumexpenditure of time and lalbor. Another feature which is inherent in mynovel form of arch is that the arch as a whole does not become a rigidmass after the manner .of the ordinary arch, for the reason that theoverlapped joints between the various members of the arch do not becomecemented tog 3;etherl by the slag which forms upon the surfaces of thearch. The arch, therefore, is. in a sense AFlexible, in that it canadjust itself to slight changes of dimensions of the lire-box withoutdestructive disintegration.

In Fig. I have illustrated an installa tion of an arch embodying myinvention, in a comparatively wide irebox which is equipped with asingle circulating tube. In

this instance the space between' the tube 'and thc side sheet being toogreat for the span of a single brick, I arrange two of the support-v ingbricks in this space forming an inverted V shaped arch after the mannerof the middle portion of thearch, as shown in Fig. 2, and I provideinwardly projecting studs 1l on the side sheets 3 for supporting theouter ends of the ans.

Inl Fig. 6 I have illustrated an installation of the arch in acomparatively narrow firebox which is provided or equipped with a fsingle circulating tube. Here the space be tween the tube and side sheetis not too great 'to be spanned by a single, brick and' I i thereforearrange a single supporting brick in this space after the manner of theside or end portions of the spans illustratedin-Iiig. The supportingbricks in thiscase are arranged in upwardly vand outwardly inclinedpositions' wedgingly engaging the tube and the side sheets.

Fig. 7 illustrates an installation of the stallation in lireboxes havinrangements of water circulating tubes and arch in a rebo'x having'three-circulating tubes, the outer ones of which are at a l higherelevation than the center tube. The weight of the arch in this form is,carried that it is one which when once installed remains permanently inposition regardless of the destructive jarring effect of the locomotive,when running. I

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

1. A locomotive boilerY firebox i. wing a plurality of arch tubes, incombination with a refractory arch body resting on' said tubes, saidbody comprising spans which extend between and rest on said tubes, saidspans being disposed in spaced apart rows and panel,

bricks which rest upon two adjacent spans' and interlock the twoadjacent bricks of' each of the two spaces which they engage.

A locomotive boiler lircboX having, a plurality of inclined arch tubes,in combination with a refractory arch body resting upon said tubes, saidbody comprising a plurality of transverse rows of refractory span bricksspaced apart on said tubes, said bricks being also arranged inlongitudinalr rows in the lireboxland panelor cover` bricks resting uponadjacent transverse rows of span bricks and overlapping at each end twospan bricksand formed to interlock therewith and prevent relativelateral movement of the span bricks. l

3. A. locomotive boiler fireboX having a plurality of inclined archtubes, in combination with transverse rows of span bricks supported bysaid tubes, and a plurality of arch panel or cover bricks in turnsupported by said span bricks and certain of said panel bricksinterlocking with the said Span bricks and preventing the lateralVseparation of adjacent span bricksl l l 4.' A locomotive boiler iireboxhaving a plurality of arch tubes, in combination with a plurality oftransverse row's of bricks spaced apart upon and extending between saidarch tubes, and a plurality of arch top forming bricks, through themedium of said transverse bricks being also supported by said archtubes, said top forming bricks closing the spaces between saidtransverse bricks and having transverse shoulders on their undersideswhich serve as stops and spacers for' said transverse bricks and cervsosis

tain parts thereof seri'ing to fnterlock the adjacent bricks in saidtransverse rows and hold them against separation. L

5. A locomotive boiler tirebox containing a plurality oi inclined archtubes in combination with two or more rows of refractory span bricksspaced apart upon said tubes and abutting the sides of the irebox, and aplurality of refractory slabs or bricks in the spaces between said rowsof span bricks spacing them apart and serving to bind the adjacent.bricks in said rows together and `ating them from separating.

5 2. ,Ik locomotive boiler firebox containing a plurality of inclinedarch tubes, in combination with tworor more substantially idenn ticaltransverse rows Y of refractory span bricks abuttingl the sides of therebox and longitudnallyfspaced apart upon said tubes, arch top or' panelbricks arranged between adjacent rows of span bricks and resting at eachend upon adjacent-ends of the bricks inV said` rows, the ends Ioli-'saidpanel bricks and or' said s pan bricks being formed to interlock witheach oth'er` and prevent the separation o/the span bricks in thelirebox.

'7. A locomotive boiler rebox containing a plurality of arch tubes, incombination with two or more transverse rows of refractory span bricksabutting the sides of the tirebox and spaced apart at different heightsupon said tubes, and arch top or cover y bricks support-ed at the endsby adjacent bricks of adacent spans, the ends of said span bricks beingformed to interlock with said cover bricks and be held thereby againstseparationn 8. In a locomotive boiler freboX having two inclined archtubes, a refractory arch comprising a plurality of arch bricks inincenso clined. transversely of the iirebox, resting at ,their loweredges upon the tubes and abutting each other at their upper ends, theadjacent ends thereof being provided with longitudinal ribs, otherbricks engaging said ribs and interlocking the rst mentioned bricks toprevent their separation transverseiy of the lirebox. 4

9. In a locomotive boiler tirebox, having a group of inclined arch tubesof less ,width than the firebox, a plurality/'of transverse rows of spanbricks longitudinally spaced of the fire-box, each of said spanscomprising a plurality ofvgroups of two bricks each, having theiradjacent edges resting upon the tubes' and extending upwardly and outwardly from the tube, certain of the bricks abutting cach other andcertain of the brick abutting the side sheets, transverse ribs along theupper outer edges of each said bricks, and cover bricks resting upon twoadjacent spans in manner to hold the spans in spaced relation and havingportions engagingthe ribs of the span bricks to interlock the spanbricks against separation transversely of the firebox.

10. In a locomotive tire box arch the conibination ot' an inclinedarchtube with two refractory bricks each having an end rest- ..ing uponsaid tube and a third refractory brick interlocking the first twoagainst separation upon said tube.'

In testimony whereof I have hereunto set my hand, this 5th day ofDecember, i911, in the presence of two subscribing witnesses.

CHARLES B. MOORE lVitnesses: f EDWARD F. WILsoN,

CHARLES GILBERT HAwLnY.

